CN104249148A - Channel type pouring basket and differential pressure type preheating method - Google Patents
Channel type pouring basket and differential pressure type preheating method Download PDFInfo
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- CN104249148A CN104249148A CN201310270326.1A CN201310270326A CN104249148A CN 104249148 A CN104249148 A CN 104249148A CN 201310270326 A CN201310270326 A CN 201310270326A CN 104249148 A CN104249148 A CN 104249148A
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- preheating
- molten steel
- steel chamber
- tundish
- pouring
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Abstract
The invention discloses a channel type pouring basket and a differential pressure type preheating method. The channel type pouring basket comprises a pouring basket body, a heat preservation cover and an induced draft fan, wherein the inner part of the pouring basket body is separated into a molten steel containing cavity and a molten steel pouring cavity by a refractory material, the lower part of the refractory material is provided with a molten steel channel which is used for connecting the molten steel containing cavity with the molten steel pouring cavity, and the height of the molten steel channel is smaller than 1/3 of the height of an inner cavity of the pouring basket body; a nozzle is formed in the bottom part of the molten steel pouring cavity; a first preheating nozzle and a second preheating nozzle are formed in positions, which correspond to the molten steel containing cavity and the molten steel pouring cavity, of a basket cover of the pouring basket body, and a flue gas outlet is also formed in the basket cover of the pouring basket body arranged at the side of the molten steel containing cavity; the heat preservation cover is arranged in the position of the nozzle arranged at the bottom part of the molten steel pouring cavity of the pouring basket body in a covering way, and an outlet is formed in the bottom part of the heat preservation cover; the induced draft fan is arranged in the position of the outlet in the bottom part of the heat preservation cover. The differential pressure type preheating method is characterized by respectively igniting the first preheating nozzle and the second preheating nozzle when preheating begins, and enabling the gas pressure of the preheating nozzle of the molten steel containing cavity to be P1, the gas pressure of the preheating nozzle of the molten steel pouring cavity to be P2 and the pumping pressure of the induced draft fan to be P3, wherein P2/P1=2-4, and P2/P3=0.05-0.3. According to the channel type pouring basket and the differential pressure type preheating method, disclosed by the invention, the flowing of gas during a whole process can be achieved during a preheating process of the channel type pouring basket, and thus better preheating effects can be obtained by the channel and the nozzle.
Description
Technical field
The present invention relates to continuous-casting art, particularly a kind of channel-type tundish and differential pre-heating mean.
Background technology
At the initial stage of continuous casting steel machine technical development, tundish just uses as the storage of molten steel and distributor.Along with continuous casting technology development and to slab quality require improve constantly, quality of molten steel to the significance of continuous casting process gradually by people are familiar with.In order to ensure direct motion and the sequence casting of continuous casting working procedure, must guarantee that molten steel has enough degrees of purity, as far as possible accurately will control the composition range of molten steel, and stable molten steel temperature and the degree of superheat will be kept within the sufficiently long time.Therefore, as last refractory material containers in the smelting process of steel, and be the connecting points being turned to continued operation by intermittently operated, the effect of tundish is very important.It except stable beam, realize except sequence casting, the more important thing is to play and promote that the floating of field trash is got rid of and the important function of pure molten steel.
Tundish is large-scale all turntable conventional during steel-making continuous casting is produced, and could meet manufacturing technique requirent after needing that its liner is baked to about 1100 DEG C before use.To ensure discharge abundant, safe for the moisture content in castable during baking of tundish, and ensure that in bake process, coating does not come off, stopper does not ftracture.
The most effective means of the formal a kind of tundish temperature compensation of the tundish channel type induction heating apparatus in recent years progressively applied and inclusion removal.
The tundish channel type induction heating apparatus of traditional arrangement, induction coil layout is held between steel chamber and trough casting chamber in reception large Baogang water, induction coil is arranged along large bag long nozzle (large water-coating port by steel device) direction center line of casting, the induction channels of induction coil both sides and tundish long axis normal, between the large water-coating port of this arrangement requirement conticaster (by steel device) and middle water containing opening center line, centre-to-centre spacing is sufficiently large, to ensure the length of enough induction coil installing spaces and enough left induction channels and induction channels.
Japanese Patent Laid-Open 4-224058 discloses a kind of electromagnetic induction heating tundish.This kind of tundish is a kind of special electromagnetic induction tundish structure form, and primarily of holding steel chamber and watering steel chamber composition, hold steel chamber and water steel chamber by two circular hole expanding channels, between circular hole passage, arranging resistance to material, tundish outlet connects the mouth of a river.This eddy-current heating tundish structure mainly contains some difference following relative to traditional tundish in warm:
(1) tundish both sides channel distance is longer, cannot toast with special roaster, opens and waters required temperature so its temperature will be made to reach molten steel and acquire a certain degree of difficulty;
(2) middle water containing opening distance is longer, how by realizing the object at the preheating mouth of a river with roaster acting in conjunction in tundish, does not all relate in current patent document.
Summary of the invention
The object of the present invention is to provide a kind of channel-type tundish and differential pre-heating mean, the flowing of gas in whole process can be reached in tundish warm, thus make passage and the mouth of a river all reach good pre-heat effect.
For achieving the above object, technical scheme of the present invention is:
A kind of channel-type tundish, it comprises, tundish body, and carry out being separated to form with resistance to material in it and hold steel chamber and water steel chamber, be provided with the molten steel channel connecting and hold steel chamber and water steel chamber in resistance to material bottom, molten steel channel height is less than 1/3rd of tundish cavity heights; Water bottom steel chamber and arrange the mouth of a river; On tundish body clad to agreeing steel chamber, water steel chamber place first, second preheating burner be set respectively, and, the tundish cover holding side, steel chamber also has exhanst gas outlet; Stay-warm case, covers at described tundish body and waters the mouth of a river bottom steel chamber, set out mouth bottom it; Take out air-introduced machine, be arranged at stay-warm case outlet at bottom place.
When preheating starts, lighted a fire respectively by first, second preheating burner, the gaseous-pressure holding the first preheating burner in steel chamber is P1, the gaseous-pressure watering the second preheating burner in steel chamber is P2, takes out air-introduced machine suction pressure P3, wherein, P2/P1=2 ~ 4, P2/P3=0.05 ~ 0.3; In bake process, keep exhanst gas outlet gas to flow out, if when exhanst gas outlet gas is for flowing into, each burner gaseous-pressure need be adjusted and take out air-introduced machine pressure; Above-mentioned baking, after 3 ~ 4 hours, is incubated after more than half an hour and can comes into operation.
Water steel chamber preheating burner gas quantity to be greater than and to hold steel chamber preheating burner gas quantity, thus make to be greater than and to hold exhaust gas volumn and flue gas pressures in steel chamber watering exhaust gas volumn and flue gas pressures in steel chamber, one side exhanst gas outlet is arranged in and holds on the tundish cover of steel chamber in addition, makes tundish hold steel chamber and water steel chamber major part flue gas to discharge from holding steel chamber.
Arrange stay-warm case watering outside the mouth of a river bottom steel chamber, bottom arranges and takes out air-introduced machine, owing to taking out the effect of air-introduced machine, the flue gas pressures in stay-warm case is made to be far smaller than the flue gas pressures of watering in steel chamber, thus make the part of smoke of watering in steel chamber have to pass through mouth of a river madial wall outflow, and discharge by taking out air-introduced machine.
Hold steel chamber at tundish and water steel chamber and arrange preheating burner respectively, by the preheating gate of preheating on pouring basket lid tundish held to steel chamber and water steel chamber and heat, pouring basket lid arranges exhanst gas outlet holding steel chamber, keeps sealing preferably at the tundish cover watering steel chamber in watering between steel chamber.
Being arranged in the preheating burner flow that tundish holds steel chamber and preheating cavity and having difference, being arranged in the gas flow of watering steel chamber burner larger than being arranged in the gas flow of holding steel chamber.
At middle water containing opening location arrangements drawing-in type stay-warm case, make the gas pressure in stay-warm case keep negative pressure, thus the realization flue gas stream watered in steel chamber flow out in blast pipe by mouth of a river inner chamber.
Advantage of the present invention is:
1) present invention achieves the good circulation of flue gas in each chamber of tundish, the preheat temperature in passage can be consistent with the temperature of two side cavity substantially;
2) the present invention is simple, and involved device structure is simple, convenient enforcement;
3) the present invention has considered the preheating of passage, the mouth of a river and tundish two chambers, has systematicness;
4) the present invention utilizes the preheating circulating to realize whole system of flue gas, and preheat temperature there will not be the high point of local, contributes to the uniformity protecting whole resistance to material system like this.
5) the present invention carries out substantially in airtight environment, prevents atmospheric reflux thus is oxidized the phenomenon of resistance to material.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Detailed description of the invention
See Fig. 1, a kind of channel-type tundish of the present invention, it comprises, tundish body 1, carry out being separated to form with resistance to material 11 in it and hold steel chamber 101 and water steel chamber 102, be provided with the molten steel channel 103 connecting and hold steel chamber 101 and water steel chamber 102 in resistance to material 2 bottom, molten steel channel 103 is highly less than 1/3rd of tundish cavity heights H; Water bottom steel chamber 102 and arrange the mouth of a river 6; On tundish body 1 clad 12 to agreeing steel chamber 101, water steel chamber 102 place first, second preheating burner 2,3 be set respectively, and, the tundish cover 12 holding side, steel chamber 101 also has exhanst gas outlet 104; Stay-warm case 4, covers at described tundish body 1 and waters the mouth of a river 6 bottom steel chamber 102, set out mouth 41 bottom it; Take out air-introduced machine 5, be arranged at stay-warm case 4 outlet at bottom 41 place.
When preheating starts, lighted a fire respectively by first, second preheating burner 2,3, the gaseous-pressure holding the first preheating burner 2 in steel chamber is P1, the gaseous-pressure watering the second preheating burner 3 in steel chamber is P2, takes out air-introduced machine suction pressure P3, wherein, P2/P1=2 ~ 4, P2/P3=0.05 ~ 0.3; In bake process, keep exhanst gas outlet 104 gas to flow out, if when exhanst gas outlet 104 gas is for flowing into, each burner gaseous-pressure need be adjusted and take out air-introduced machine pressure; Above-mentioned baking, after 3 ~ 4 hours, is incubated after more than half an hour and can comes into operation.
Embodiment 1
The gas consumption that tundish holds steel chamber first preheating burner is 500Nm
3/ h, watering steel chamber second preheating burner flue gas consumption is 200Nm
3/ h, holding steel chamber pouring basket lid exhanst gas outlet is 0.2m
2, the rate of air sucked in required that middle water containing opening stay-warm case takes out air-introduced machine is 150Nm
3/ h.
Embodiment 2
The gas consumption that tundish holds steel chamber first preheating burner is 800Nm
3/ h, watering steel chamber second preheating burner flue gas consumption is 300Nm
3/ h, holding steel chamber pouring basket lid exhanst gas outlet is 0.3m
2, the rate of air sucked in required that middle water containing opening stay-warm case takes out air-introduced machine is 200Nm
3/ h.
Embodiment 3
The gas consumption that tundish holds steel chamber first preheating burner is 900Nm
3/ h, watering steel chamber second preheating burner flue gas consumption is 400Nm
3/ h, holding steel chamber pouring basket lid exhanst gas outlet is 0.35m
2, the rate of air sucked in required that middle water containing opening stay-warm case takes out air-introduced machine is 260Nm
3/ h.
In the production process of tundish extensive use and casting process, the present invention can apply with the structural design of various tundish, molten steel can be opened in the process of watering fall to the surge at the bottom of middle handbag by alleviating of high degree, thus the service life of tundish can be extended, avoid occurring that the accident that Metal in Tundish punctures at the bottom of tundish occurs, ensure on-the-spot safety in production, save the cost of use of resistance to material simultaneously.
Claims (2)
1. a channel-type tundish, is characterized in that, comprises,
Tundish body, carry out being separated to form with resistance to material in it and hold steel chamber and water steel chamber, be provided with the molten steel channel connecting and hold steel chamber and water steel chamber in resistance to material bottom, molten steel channel height is less than 1/3rd of tundish cavity heights; Water bottom steel chamber and arrange the mouth of a river; On tundish body clad to agreeing steel chamber, water steel chamber place first, second preheating burner be set respectively, and, the tundish cover holding side, steel chamber also has exhanst gas outlet;
Stay-warm case, covers at described tundish body and waters the mouth of a river bottom steel chamber, set out mouth bottom it;
Take out air-introduced machine, be arranged at stay-warm case outlet at bottom place.
2. the pre-heating mean of channel-type tundish as claimed in claim 1, it is characterized in that, when preheating starts, lighted a fire respectively by first, second preheating burner, the gaseous-pressure holding the first preheating burner in steel chamber is P1, and the gaseous-pressure watering the second preheating burner in steel chamber is P2, take out air-introduced machine suction pressure P3, wherein, P2/P1=2 ~ 4, P2/P3=0.05 ~ 0.3; In bake process, keep exhanst gas outlet gas to flow out, if when exhanst gas outlet gas is for flowing into, each burner gaseous-pressure need be adjusted and take out air-introduced machine pressure; Above-mentioned baking, after 3 ~ 4 hours, is incubated after more than half an hour and can comes into operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310270326.1A CN104249148B (en) | 2013-06-28 | 2013-06-28 | A kind of differential pre-heating mean of channel-type tundish |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310270326.1A CN104249148B (en) | 2013-06-28 | 2013-06-28 | A kind of differential pre-heating mean of channel-type tundish |
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| CN104249148A true CN104249148A (en) | 2014-12-31 |
| CN104249148B CN104249148B (en) | 2017-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108817365A (en) * | 2018-07-05 | 2018-11-16 | 温州大学 | A kind of channel-type tundish and its pre-heating mean that heats up |
Citations (9)
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|---|---|---|---|---|
| JPS61273245A (en) * | 1985-05-28 | 1986-12-03 | Sumitomo Metal Ind Ltd | Preheating method for tundish |
| JPH0749141B2 (en) * | 1990-12-26 | 1995-05-31 | 新日本製鐵株式会社 | Induction heating tundish |
| JPH09122854A (en) * | 1995-10-30 | 1997-05-13 | Kawasaki Steel Corp | Preheating method of tundish for continuous casting |
| CN2286437Y (en) * | 1996-08-29 | 1998-07-22 | 天津钢管公司 | Suction type heating means for tundishes pouring opening |
| JP2000117401A (en) * | 1998-10-13 | 2000-04-25 | Sumitomo Metal Ind Ltd | Tundish and continuous casting method |
| KR20090066839A (en) * | 2007-12-20 | 2009-06-24 | 주식회사 포스코 | Tundish for continuous casting |
| CN101704098A (en) * | 2009-11-15 | 2010-05-12 | 江阴亚赛冶金设备修造有限公司 | Channel type induction heater for tundish |
| CN101905314A (en) * | 2010-04-09 | 2010-12-08 | 衡阳华菱连轧管有限公司 | Method for baking horizontal continuous casting tundish and horizontal continuous casting tundish with negative pressure device |
| CN102218525A (en) * | 2011-05-25 | 2011-10-19 | 浙江大学 | High-efficiency energy-saving baking device of continuous casting tundish |
-
2013
- 2013-06-28 CN CN201310270326.1A patent/CN104249148B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61273245A (en) * | 1985-05-28 | 1986-12-03 | Sumitomo Metal Ind Ltd | Preheating method for tundish |
| JPH0749141B2 (en) * | 1990-12-26 | 1995-05-31 | 新日本製鐵株式会社 | Induction heating tundish |
| JPH09122854A (en) * | 1995-10-30 | 1997-05-13 | Kawasaki Steel Corp | Preheating method of tundish for continuous casting |
| CN2286437Y (en) * | 1996-08-29 | 1998-07-22 | 天津钢管公司 | Suction type heating means for tundishes pouring opening |
| JP2000117401A (en) * | 1998-10-13 | 2000-04-25 | Sumitomo Metal Ind Ltd | Tundish and continuous casting method |
| KR20090066839A (en) * | 2007-12-20 | 2009-06-24 | 주식회사 포스코 | Tundish for continuous casting |
| CN101704098A (en) * | 2009-11-15 | 2010-05-12 | 江阴亚赛冶金设备修造有限公司 | Channel type induction heater for tundish |
| CN101905314A (en) * | 2010-04-09 | 2010-12-08 | 衡阳华菱连轧管有限公司 | Method for baking horizontal continuous casting tundish and horizontal continuous casting tundish with negative pressure device |
| CN102218525A (en) * | 2011-05-25 | 2011-10-19 | 浙江大学 | High-efficiency energy-saving baking device of continuous casting tundish |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108817365A (en) * | 2018-07-05 | 2018-11-16 | 温州大学 | A kind of channel-type tundish and its pre-heating mean that heats up |
| CN108817365B (en) * | 2018-07-05 | 2020-05-05 | 温州大学 | Channel type tundish and heating and preheating method thereof |
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| Publication number | Publication date |
|---|---|
| CN104249148B (en) | 2017-04-05 |
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